/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.cadoc.cqe;

import java.util.Map;

import org.cadoc.cqe.logic.Pattern;
import org.cadoc.cqe.logic.Variable;

public interface PatternAnalyzer {

	/**
	 * Calculates a fact vector for each used logical variable in the query (the pattern)
	 * @param pattern
	 * @return
	 */
	public Map<? extends Variable, Integer> analyze(Pattern pattern);  
}
